题干
The Great Wall is very .
A：short and wide
B：long and very old
C：wide and very beautiful
答案(点此获取答案解析）
B
The Great Wall is very .
A：short and wide
B：long and very old
C：wide and very beautiful
：抛物线
的准线方程为
；命题
：若函数
为偶函数，则
关于
对称．则下列命题是真命题的是 ( )
